int getVowel(char str[],char vowel[]){
    int cnt=0;
    while(*str!='\0'){
        if(*str=='a'||*str=='e'||*str=='i'||*str=='o'||*str=='u'){
            vowel[cnt++]=*str;
        }
        str++;
    }
    vowel[cnt]='\0';
    return cnt;
}